Redraw truss as attic truss

[GeneDavis]

I've a simple one floor house and have truss-framed the roof, and now want a six-truss run, 10 feet in length, to all be attic trusses so we can have a platform deck on which to mount HVAC equipment.

 

The depth of the bottom chord for the rebuild  is unknown but it's certainly not 3.5".

 

Do I just draw my "room" with invisible attic walls and guess the floor structure at, say, 7.25"?  And the rebuild the affected trusses?

 

[JiAngelo]

Gene,

I happen to be working on a ranch.  Here's the steps I followed.

 

 

Make a blank second floor and specify a ceiling height (97-1/8") and your floor structure (9‐1/4"+3/4").

 

In Build Roof dbx select ignore Top (2nd) Floor.

 

Draw your room.

 

Select and Open those trusses and select "Attic Truss"

 

Open 3d view and turn on floor surfaces amd you will see the plywood hovering above the bottom chord of a standard room truss.

 

Pick one of those trusses and open truss detail.  Break the bottom chord between the attic room ends and increase the middle bottom chord to 9-1/4"

 

Close the truss detail and go back to the 3d view and you will see all the floor trusses should be shown correctly.

 

Hope this helps.